Messages in this thread Patch in this message | | | From | Ankur Patel <> | Subject | [PATCH 1/1] HWMON: TMP102 - Added support for 12 bit data | Date | Wed, 22 Jun 2011 09:58:52 +0530 |
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From: Ankur Patel <ankur.patel@quipment.in>
In tmp102.ko driver support for 12 bit data is added.
Signed-off-by: Ankur Patel <ankur.patel@quipment.in> --- drivers/hwmon/tmp102.c | 28 ++++++++++++++++++++-------- 1 files changed, 20 insertions(+), 8 deletions(-)
diff --git a/drivers/hwmon/tmp102.c b/drivers/hwmon/tmp102.c index 5bd1949..6e03a87 100644 --- a/drivers/hwmon/tmp102.c +++ b/drivers/hwmon/tmp102.c @@ -47,6 +47,9 @@ #define TMP102_TLOW_REG 0x02 #define TMP102_THIGH_REG 0x03 +#define TMP102_CONFIG (TMP102_CONF_TM | TMP102_CONF_EM | TMP102_CONF_CR1) +#define TMP102_CONFIG_RD_ONLY (TMP102_CONF_R0 | TMP102_CONF_R1 | TMP102_CONF_AL) + struct tmp102 { struct device *hwmon_dev; struct mutex lock; @@ -68,16 +71,26 @@ static inline int tmp102_write_reg(struct i2c_client *client, u8 reg, u16 val) return i2c_smbus_write_word_data(client, reg, swab16(val)); } -/* convert left adjusted 13-bit TMP102 register value to milliCelsius */ +/* convert left adjusted TMP102 register value to milliCelsius for 13 bit & + * 12 bit by dividing with 128 & 256 respectively*/ static inline int tmp102_reg_to_mC(s16 val) { - return ((val & ~0x01) * 1000) / 128; + #if TMP102_CONFIG & TMP102_CONF_EM + return ((val & ~0x01) * 1000) / 128; + #else + return ((val & ~0x01) * 1000) / 256; + #endif } -/* convert milliCelsius to left adjusted 13-bit TMP102 register value */ +/* convert milliCelsius to left adjusted TMP102 register value for 13 bit & + * 12 bit by multiplying with 128 & 256 respectivley*/ static inline u16 tmp102_mC_to_reg(int val) { - return (val * 128) / 1000; + #if TMP102_CONFIG & TMP102_CONF_EM + return (val * 128) / 1000; + #else + return (val * 256) / 1000; + #endif } static const u8 tmp102_reg[] = { @@ -126,7 +139,9 @@ static ssize_t tmp102_set_temp(struct device *dev, if (strict_strtol(buf, 10, &val) < 0) return -EINVAL; - val = SENSORS_LIMIT(val, -256000, 255000); + /* It will limit the Input temperature range to -55 Deg. Cel to + * 150 Deg. Cel */ + val = SENSORS_LIMIT(val, -55000, 150000); mutex_lock(&tmp102->lock); tmp102->temp[sda->index] = val; @@ -155,9 +170,6 @@ static const struct attribute_group tmp102_attr_group = { .attrs = tmp102_attributes, }; -#define TMP102_CONFIG (TMP102_CONF_TM | TMP102_CONF_EM | TMP102_CONF_CR1) -#define TMP102_CONFIG_RD_ONLY (TMP102_CONF_R0 | TMP102_CONF_R1 | TMP102_CONF_AL) - static int __devinit tmp102_probe(struct i2c_client *client, const struct i2c_device_id *id) { -- 1.7.0.4
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